Mechanism for preventing successive changes in automatic looms.



A. BRIOT. MECHANISM FOR PREVENTING SUCCESSIVE CHANGES IN AUTOMATIC LOOMS. APPLICATION FILED DEC- 9' l9l3.

1 ,1 9@,@@@. Patented Jul 11, 1916.

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MECHANISM FOR PREVENTING SUCCESSIVE CHANGES IN AUTOMATIC LOOMS.

APPLICATION FILED DEC-9. 1913.

1,1 9,855. Patented July 11, 1916.

2 SHEETS-SHEET 2.

/7 Z] 2'2 Z 1/ 0 T $4 A? f I m i g %L n a 1/ l3 as Z 9 /%/ZZ r9 7 wane/mes ALBERT 133101, 05 PARIS, FRANCE.

MECHANISM FOR PREVENTING SUCCESSIVE CHANGES IN AUTOMATIC LOOMS.

Original application filed July 19, 1911, Serial No. 639,286.

Specification of Letters Patent.

Patented July 11, T9116.

Divided and this application filed December 9,

1913. Serial No. 805,482.

To all whom it may concern Be it known that I, ALBERT Bnior, a citizen of the Republic of France, residing at Paris, France, have invented certain new and useful Improvements in Mechanism for Preventing Successive Changes in Automatic Looms, of which the following is a full, clear, and exact description.

This invention relates to mechanism for preventing successive changes in automatic looms.

In looms with an automatic cop changing device for replenishing the weft thread, particularly of the kind described in my application Serial .No. 639,286, of which the present application is a division, it may easily happenthat the weft thread will be broken due to defects in the threader or from various other causes. This will cause successive replacements of full cops by the automatic cop changing mechanism until the entire stock of cops has been exhausted.

The primary object of my invention is to overcome these defects and consists of means for rendering the automatic cop changing mechanism inoperative for a determined number of shots of the shuttle after the change is made and for edecting the stoppage of the loom if the weft thread is broken during this period.

My invention also comprehends an arrangement of the means for rendering the automatic cop changing mechanism inoperative whereby the same may be manually placed out of action and the loom operated similar to the ordinary type of loom.

In the drawings, Figure 1 is a plan View of the weft stop motion and mechanism for effecting the stoppage of the loom and preventing further operation of the cop changing mechanism; Fig. 2 is a side elevation of Fig. 1; Figs. 3, 4, 5 and 6 are diagrammatic views of the mechanism shown in Fig. 1, in the difl'erent positions occupied thereby during the operation. I

To the immovable breast beam of the loom, there is attached a solid frame or mounting 1, having flanges provided with openings therein through which slides a rod 2 of the weft stop motion. A support 3 fastened to the rod 2 is provided with a laterally projecting pivot pin 4 on which is independently mounted a pawl 5 and a toothed sector 6 which has a plurality of teeth 7 cut in pe- 5 riphery thereof, two teeth being shown but preferably a greater number will be used as will be clear from the operation of the device. The support 3 and the associated parts are normally urged to the position shown in Fig. 1, 2'. 6., the forward position of the sup port, by a spring 8 coiled around the rod 2.

The automatic cop changing mechanism as shown in my patent application, Serial No. 639,286 is actuated through the instrumentality of the shaft 10, which is connected to the automatic cop changing mechanism (not shown). The shaft 10 is rotated by a curved lever 11, having a notch 12 therein which, when the parts are in the position shown in Fig. 1, is in line with the end of the pawl 5. The pawl 5 is maintained in this position by a pin 13 mounted thereon, which rests on the sector 6 which sector is malntained in position by a spring 14 attached to the support 3. The free end of this spring engages in notches 15 cut in the hub of the sector 6, the number of notches being equal to the number of teeth 7, and arranged in radial alinement therewith so that if the sector 6 receives a step by step movement, by advancing the sector 6, the distance of one tooth at a time, the sector will be retained in the different positions to which it has been moved.

A. weft thread engaging member 16 pivotally mounted to the rear end of the rod 2, is provided with a hook portion 17 which when the weft thread is broken, falls into engagement with a tooth 17, carried by an oscillatory hammer 18 and moves the rod 2 and the pawl 5 rearwardly, the pawl 5 engaging in the notch 12 and operating the automatic cop changing mechanism when the parts are in the position shown in Fig. 1. The sector 6 in its rearward movement strikes against an adjustable pin 19 mounted on the frame 1 which rotates the sector 6, permitting the pawl 5 to fall into engagement with the end of a bent lever 20 connected to the mechanism (not shown) for effecting the stoppage of the loom. This sector 6 is returned to its normal position by a step by step movement imparted to it by a pawl 21, pivotally mounted as at 22 on the hammer 18. This pawl isheld against a pin 23 by a spring 24 so as to be in position when the hammer oscillates with respect to the sector 6, to advance the sector one tooth at a time, until, after a determined number of oscillations, each corresponding to a shot of a shuttle, the sector 6 is returned to its normal position and the return the-sector 6 to its normal position,

pawl 5 is again lifted to the position shown in Fig. 1.

A handle 25 is secured to thesector 6 .whereby the same may be rotated in a clockwise direction to the position shown in Fig.

6 to throw its'teeth 7 out of the path of the pawl 21 and to permit the pawl 5 to drop into engagement with the end of the lever 20.

Mode of operation: .VVhen the weft thread is broken, the weft-engaging member 16 falls into the notch -17"of the oscillatory hammer 18 of the weft stop motion, draw-- ing the fork holderrod- 2 rearwardly against the action of the spring 8. The pawl 5 engages in thenotch -12 of the lever' 11 and causes -the"sha-f t.- l0 to turn,- whereby the latter actuates the cop changingmechanism. While the rod 2 is, being drawnrearwardly, the sector Gstrikes against-the pin 19 which is adjusted to forcethe'sector 6 to turn through an anglesuflicient to bring the sector into a position wherethe left'hand tooth of the sector as viewed in Fig. 3 will be in a position to =be-engaged by the -pawl 21, irrespective of whether two-0r a greater number of teeth are-used.-'The*parts-have now assumed aposition which is diagram--- matically illustrated -in Fig. 3. Upon a forward movementof the hammer 18 of the weft stop motion, the-'pawl 2l passes freely beneath the teeth 7' of the-sector 6' which is retained in the-.positionshown in Fig. 3, by

the action of the spring-1a engaging in oneof the'notches-15. Th'ejsp'r-ing 8-;returns-the support 3 to its-normal position, and-the pawl 5 being no longer suppo'rted by the en- 'gagementof the-pin 13 with the toothed sector 6, falls'by its-own-weight when theendthereof is drawn out of engagement with the notch 12 and assumes the position illustrated in Fig. 4, that'is, it dropsinto engagement with the-bent 1ever20 which is connected to themechanism for stopping the loom.

As shown, thetoothed lever? is provided with but two I teeth--so that in order to it mustbe given two partial rotations or step by stepmovements in order to again bring it into engagement with the pin 13 to thereby raise the pawl 6 to its normal posi-v l tion. If a greater number of teeth are used,

then thenumber of oscillations of the hammer 18 required is greater, and as each oscillation corresponds to one shot of the shuttle, it will be evident that thecop changing mechanism.may be held inoperative until a desired number ofweft threads have been passed.

In the operation of the loom, three different cases may arise;

First, the automatic cop changing mechanism is correctly operated and the weft thread is passed in the'proper manner. In

7 the change of cops has correctly taken place,

sector 6 to the position illustrated in Fig...

before a determined numberof weftthreads which case, the hammer 18 of the weft stop motion oscillates but the fork carrying rod 2 remains in a state of rest. The pawl 21 will then engage, first, with one tooth of the sector 6 and impart to it a partial rotation; and again, upon the second oscillation of the.l1ammer,..will engage with the. second is drawn backward, due to the=engage1nent of the member 16 in the notch 17 of the hammer 18, and the pawl 5 moves the lever 20 to stopthe loom without actuating the lever 11, andzconsequently, without a change being performed.

Third, the shot of the shuttle following but the weft thread has not-been threaded by the threader. The hammer 18 of the weft stop motion oscillates and advances the r 5, i. e., the sector hasnbeen.advancedv the. 1 distance of one tooth. -However,-since the I weft threadhas :missed, the sametwill tear.

on theneXt shotso that on the following oscillation of the hammer, the. fork carrying. rod 2 will be carried along therewith and the;

. sector 6 forced-back to the position shownl in Fig. 4, byengagement-withthe pin.19. The pawl-5 will therefore engagelwith them lever 20 and effect the operation of thestop- 1 pin-g1necl1anism,-.as has-already been described..-

The handle 25 is providechto permitthetturning of the toothed sector6 for the ipur pose of throwing it out of the path of the. pawl 21. (see-Fig. 6).: The pawl5 is then. always in aposition to engage with the lever 20 and-the replacing mechanismis rendered inoperative, under which circumstances the 1.. loom Wlll operate llke an ordinary loom.

Having describedmy invention, I claim 1. In looms, a weft stop motion, an auto-1.! matic, cop changing mechanism, mechanisnr. for stopping the loomswhenafter achange of cops said weft stop motiontis actuatedz w have been correctly passed, said. mechanism includinga toothedsector, means co-acting with saidteeth for displacing said. sector with a stepflby step motion, a lever foracontrolling the actuation ofthe loom and a 1 25 device engageable by said sector and-adapt---.

'ed fol-engagement with-saidllever'when said.

sector has been displaced a number of steps corresponding to a determined number.

matic cop changing mechanism, mechanism for stopping the loom without actuating the cop changing mechanism, when after a change of cops said weft stop motion is actuated before a determined number of shots of the shuttle have occurred, said mechanism including an intermediate part adapted to have a step by step motion imparted thereto, means for displacing said part step by step for each of said determined number of shots of the shuttle, a lever for controlling the actuation of the loom, and a device engageable by said intermediate part and adapted for engagement with said cop changing mechanism when in one position and with said lever when in another position, said cop changing mechanism being unactuated when said device is out of engagement with said actuating member, said device engaging said lever when said intermediate part has been displaced a number of steps corresponding to said determined number.

3. In looms, in combination, a member controlling the actuation of an automatic cop changing mechanism, a member controlling the stoppage of the loom, a mechanism engaging with one or the other of the two members for actuating the same upon a failure of the weft thread, and a step-bystep device controlling the engagement of said mechanism with said second named member.

In witness whereof, I subscribe my signature, in the presence of two witnesses.

ALBERT BRIOT.

Witnesses CARUs DANZER, FRANoIs OREsPIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

